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  1. No Access

    Article

    Photoluminescence Spectroscopy of Er3+/Yb3+ Co-Activated Silica-Alumina Monolithic Xerogels

    Two Er3+/Yb3+ monolithic silica-alumina xerogels doped with different Yb3+ concentrations were prepared by sol–gel route. The samples were thermally treated in air at 950°C for 120 h, and Raman and UV-visible-NIR...

    C. Armellini, A. Chiasera, S. Dirè, M. Ferrari… in Journal of Sol-Gel Science and Technology (2004)

  2. No Access

    Article

    Erbium-Activated Silica-Titania Planar Waveguides

    (100 − x)SiO2-(x)TiO2-ErO3/2 planar waveguides, with 7 ≤ x ≤ 20 have been prepared by sol-gel route using the dip-coating technique. The thickness of the films was optimized to support a single propagating mode a...

    L. Zampedri, M. Ferrari, C. Armellini… in Journal of Sol-Gel Science and Technology (2003)

  3. No Access

    Article

    Er3+/Yb3+ Co-Activated Silica-Alumina Monolithic Xerogels

    Monolithic silica xerogels doped with different concentrations of Er3+, Yb3+ and Al3+ were prepared by sol-gel route. Densification was achieved by thermal treatment in air at 950°C for 120 h with a heating rate ...

    A. Chiasera, M. Montagna, R. Rolli, S. Ronchin… in Journal of Sol-Gel Science and Technology (2003)

  4. No Access

    Article

    Fabrication and Characterization of Sol-Gel GeO2-SiO2Erbium-Doped Planar Waveguides

    GeO2-SiO2 sol-gel planar waveguides doped with Er were deposited by spinning on silica substrates. P2 O5 or Al2O3 were used as co-dopants to improve erbium dissolution in the GeO2-SiO2 matrix. Multilayer amorp...

    A. Martucci, G. Brusatin, M. Guglielmi… in Journal of Sol-Gel Science and Technology (1998)

  5. No Access

    Article

    Control of semiconductor particle size in sol-gel thin films

    Thin silica and silica-titania films containing CdS and PbS quantum size particles were obtained by separate preparation of the matrix and the colloidal sols and successive mixing. Sulfide particles were obtai...

    M. Guglielmi, A. Martucci, E. Menegazzo… in Journal of Sol-Gel Science and Technology (1997)

  6. No Access

    Article

    Control of Semiconductor Particle Size in Sol-Gel Thin Films

    Thin silica and silica-titania films containing CdS and PbS quantum size particles were obtained by separate preparation of the matrix and the colloidal sols and successive mixing. Sulfide particles were obtai...

    M. Guglielmi, A. Martucci, E. Menegazzo… in Journal of Sol-Gel Science and Technology (1997)